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Date: Sat, 30 Dec 2017 19:58:00 +0200
From: Dan Aloni <dan@...nelim.com>
To: linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Cc: Dan Aloni <dan@...nelim.com>,
Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH 1/5] crypto: fix memory leak in rsa-kcs1pad encryption
From: Dan Aloni <dan@...nelim.com>
The encryption mode of pkcs1pad never uses out_sg and out_buf, so
there's no need to allocate the buffer, which presently is not even
being freed.
CC: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Dan Aloni <dan@...nelim.com>
---
crypto/rsa-pkcs1pad.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c
index 2908f93c3e55..e8354084ef4e 100644
--- a/crypto/rsa-pkcs1pad.c
+++ b/crypto/rsa-pkcs1pad.c
@@ -261,15 +261,6 @@ static int pkcs1pad_encrypt(struct akcipher_request *req)
pkcs1pad_sg_set_buf(req_ctx->in_sg, req_ctx->in_buf,
ctx->key_size - 1 - req->src_len, req->src);
- req_ctx->out_buf = kmalloc(ctx->key_size, GFP_KERNEL);
- if (!req_ctx->out_buf) {
- kfree(req_ctx->in_buf);
- return -ENOMEM;
- }
-
- pkcs1pad_sg_set_buf(req_ctx->out_sg, req_ctx->out_buf,
- ctx->key_size, NULL);
-
akcipher_request_set_tfm(&req_ctx->child_req, ctx->child);
akcipher_request_set_callback(&req_ctx->child_req, req->base.flags,
pkcs1pad_encrypt_sign_complete_cb, req);
--
2.13.6
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